Panasonic Cs W50btp Cu W50bbp8 Cu V50bbp8 Repair Manual

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							22.1. Energy save setting
 
    • 
• •  • 
Upper and lower limit can be set for the setting temperature
during cooling and heating operation. (The factory shipment
setting has an upper limit of 31°C and a lower limit of 16°C.)
 1. While operation is stopped, press theTEMP UP and TEMP
DOWNbuttons simultaneousl y.
 2. To set an upper limit
Press the OPERATION button until HEAT is display ed.
↓
Press the TEMP UP or TEMPDOWNbutton to set the
temperature.
↓
Press the SET button to complete the upper limit setting.
Example:
If the heating display is set to 28°C, setting the temperature
to higher than 28°C will not be possible.
* Upper and lower limits cannot be set at the same time.
 3. To set a lower limit
Press the OPERATION button until COOL is display ed.
↓
Press the TEMP UP or TEMPDOWNbutton to set the
temperature.
↓
Press the SET button to complete the lower limit setting.
Example:
If the cooling display is set to 22°C, setting the temperature
to lower than 22°C will not be possible.
* Press the CANCEL button to cancel the setting.
22.2. Switching to the remote
control thermistor
 
    • 
• •  • 
The temperature detection thermistor used for detecting the
indoor temperature can be switched between the thermistor
at the indoor unit and the thermistor at the remote control
unit. (The factory shipment setting is at the indoor unit side.)
 1. While operation is stopped, press and hold theTEST RUN
button, TEMP UP button and TEMPDOWNbutton
simultaneousl y.
Press theFORWARD orBACK timer button to change the
temperature detection setting.
 2. Press the SET button to complete the setting.
To change the setting, repeat the above operation.
22 SETTING OF SAVE ENERGY AND THERMISTOR SWITCH
52 
						

							Setting group for 1 remote control unit
 
    • 
• •  • 
W hen using a remote control thermostat, the thermostat
setting is used for all indoor units in the group.
 
    • 
• •  • 
During group control, up to a maximum of 16 indoor units
can be connected. (Do not mix heat pump units and
cooling-only units.)
 
    • 
• •  • 
Do not mix manua l settings and automatic settings. (Manual
settings take priority.)
 
    • 
• •  • 
The master unit and slave units can be centralized
controlled during group control.
Automatic setting for group control
 
    • 
• •  • 
If the power supplie s for indoor units which are connected
are turned on simultaneousl y, the indoor unit numbe rs will
Automatic address resetting for group control
Set the DIP switches 1 to 4 to OFF and stop the operation.
Then press the “AIR SWING AUTO” “OPERATION ” and “Air
conditioner No.” buttons simultaneousl y. Then addresses will
be momentarily reset, and then automatic address setting will
be carried out once more.be determined automatically after approximately 1 minute.
(DIP switch settings are not necessary.)
NOTE:
 
    • 
• •  • 
Correct wiring connections are a basic requirement for
automatic setting. If the wires are connected incorrectly
when the power is turned on, the settings will not be made
correctly and operation will not be possible.
 
    • 
• •  • 
W hen address numbe rs are set automatically , you will not
know which address numbe r corresponds to which indoor
unit.
 
    • 
• •  • 
Do not turn off the power supply for at least 1 minute during
automatic address setting, otherwise the settings will not be
made correctly.
Notewithregard to the Mini-cassette
Whencarrying out group control of a Mini-cassette system
using a single wireless remote control, be sure to disconnect
the connectors for all receptor circuit boards except the one for
indoor unit. No. 1, before turning on the power. (The same
action as for the slave units in twin and triple systems is
necessary.)
23 GROUP CONTROL
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							If test operation does not proceed correctly
Carry out test operation after approximately 12 hours have passed
since the power was turned on (crankcase heater is energized). If
operation is started by using the remote control within 1 minute of
turning on the power, the outdoor unit settings will not be made
correctly and correct operation will not be possible.
If the following symptoms occur after turning on the power,
check the wiring connections once more.
 
    • 
• •  • 
For standard installation
(System example)
 1. The main power is turned on while the indoor-outdoo r
transmission wires are not connected (open circuit at
section A)
Symptom:
Remote control unit... “CHECK” flashes
NOTE:
Indoor unit... LED2 on printed circuit board flashes
Outdoor unit... LED3 and LED7 on printed circuit board
flash
 2. The main power is turned on while the indoor-outdoo r
power supply wires are not connected (open circuit at
section B)
Symptom:
Remote control unit... Display of “No power supply”
NOTE:
Indoor unit... No display
Outdoor unit... LED3 and LED7 on printed circuit board
flash
 3. The main power is turned on while the remote control
unit connection cord is not connected (open circuit at
section C)
Symptom:
Remote control unit... Display of “No power supply”NOTE:
Indoor unit... LED1 on printed circuit board stays
illuminated
Outdoor unit... LED1 on printed circuit board stays
illuminated
(When remote controldisplay shows “Power supply ”)
(When remote controldisplay shows “No power supply ”)
Remedy
 1. Turn off the main power.
↓
 2. Conne ct the disconnected wire correctly.
↓
 3. Turn on the main power.
↓
 4. After 1 minute, start the operation using the remote
control.
(Indoor unit operation will start according to the remote
control setting.)
(Outdoor unit operation will start after 3-5 minutes.)
NOTE:
The “CHECK” display on theremote control and the
flashing of LEDs on the printed circuit boards will not occur
immediately. They will appear 3-6 minutes after the main
power is turned on.
24 TROUBLESHOOTING
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							 1. The main power is turned on while the transmission
wires between the indoor unit(s) are not connected
(open circuit at section A)
Symptom:
Nothing abnormal appears on the remote control
display . If operation is started in this condition, the
combination of the 50BB outdoo r unit and the 14BB4
indoor unit (master unit) will result in abnormal
operation.
↓
If operation continues, an abnormality will occur on the
refrigeration cycle and operation will stop.
 
    − 
− −  − 
Remote control... “CHECK” flashes
 
    − 
− −  − 
Indoor unit (master)... The LEDs on the printed
circuit board flash and operation stops
 
    − 
− −  − 
Indoor unit (slave)... LED1 on the printed circuit
board illuminates and the unit does not operate at all
 
    − 
− −  − 
Outdoor unit... The LEDs on the printed circuit board
flash and operation stops
 2. The main power is turned on while the power supply
wires between the indoor unit(s) are not connected
(open circuit at section B)
Symptom:
Same as above. If operation continues, an abnormality
will occur on the refrigeration cycle and operation will
stop.
↓
 
    − 
− −  − 
Remote control... “CHECK” flashes
 
    − 
− −  − 
Indoor unit (master)... The LEDs on the printed
circuit board flash
 
    − 
− −  − 
Indoor unit (slave)... The LEDs on the printed circuit
board do not illuminate and the unit does not
operate at all
 
    − 
− −  − 
Outdoor unit... The LEDs on the printed circuit board
flash and operation stops
 3. The main power is turned on while the remote controlconnection cord is not connected (open circuit at section
C)
Symptom:
 
    − 
− −  − 
Remote control unit.. . Display of “No powersupply ”
 
    − 
− −  − 
Indoor unit (master)... LED1 on the printed circuit
board stays illuminated and the unit does not
operate
 
    − 
− −  − 
Indoor unit (slave)... LED1 on the printed circuit
board stays illuminated and the unit does not
operate
 
    − 
− −  − 
Outdoor unit... LED1 on the printed circuit board
stays illuminated and the unit does not operate
Remedy
 1. Turn off the main power.
↓
 2. Conne ct the disconnected wires correctly.
↓
 3. Turn on the main power.
↓
 4. After 1 minute, start the operation using the remote
control.
(Indoor units’ operation will start according to the remote
control setting.)
(Outdoor unit operation will start after 3-5 minutes.)
If slave units do not operate even after the wiring has been
corrected (automatic addressing is not possible)
 1. Check that DIP switches 1 to 4 and DIP switch 8 are all
set to OFF, and then stop operation.
↓
 2. Press the ADDRESS RESET button(SW3) at the
outdoo r unit for approximately 4 seconds
(The self-diagnosis LEDs 2 to 8 will illuminate in order,
and the system is reset once they are all illuminated.)
The above procedure cannot be used to carry out automatic
address resetting during group control.
55 
						

							 1. The main power is turned on while the transmission
wires between the indoor unit and the outdoor unit are
not connected (open circuit at section A)
Symptom:
Operation of indoor unit No. 1 and indoor unit No. 3 is
possible.
However, “CHECK” flashes in the remote controldisplay
for 3-5 minutes after the main power is turned on.
 
    − 
− −  − 
Remote control... “CHECK” flashes
 
    − 
− −  − 
Indoor unit No. 2... LED2 on the printed circuit board
flashes (both master and slave units)
 
    − 
− −  − 
Outdoor unit No. 2... LED3 and LED7 on the printed
circuit board flash
 2. The main power is turned on while the power supply
wires between the indoor units are not connected (open
circuit at section B)
Symptom:
Operation of indoor unit No. 1 and indoor unit No. 3 is
possible
However, if operation is then started in this condition,
the combination of the 28BB outdoo r unit and the 14BT
indoor unit (master unit) will result in abnormal operation
of indoor unit No. 2.
↓
If operation continues, an abnormality will occur on the
refrigeration cycle and operation will stop
 
    − 
− −  − 
Remote control... “CHECK” flashes (indoor unit No.
2 abnormality)
 
    − 
− −  − 
Indoor unit No. 2... LED2 on the printed circuit board
flashes (both master and slave units)
 
    − 
− −  − 
Outdoor unit No. 2... The LEDs on the printed circuit
board flash
 3. The main power is turned on while the remote control
connection cord is not connected (open circuit at section
C)Symptom:
Nothing abnormal appears on the remote control
display , and operation of indoor unit. No. 1 and indoor
unit No. 2 is possible.
However, indoor unit No. 3 cannot be operated.
 
    • 
• •  • 
Remedy
 1. Turn off the main power.
↓
 2. Conne ct the disconnected wires correctly.
↓
 3. Turn on the main power.
↓
 4. After 1 minute, start the operation using the remote
control.
(Indoor units’ operation will start according to the remote
control setting.)
(Outdoor units’ operation will start after 3-5 minutes.)
If slave units do not operate even after the wiring has been
corrected (automatic addressing is not possible)
 1. Check that DIP switches 1 to 4 and DIP switch 8 are all
set to OFF, and then stop operation.
↓
 2. Press the “AIR SWING AUTO”, “OPERATION ” and “A/C
No.” buttons simultaneousl y.
The addresses will be momentarily reset, and then
automatic address setting will be carried out once more.
The above procedure cannot be used to carry out automatic
address resetting of twin/triple control.
(Note on automatic address setting)
The printed circuit boards automatically store the connected
system configuration when power is supplie d. As a result,
once the power has been turned on for these printed circuit
boards, the units can not be changed about within the
system, even if the units are of the same model and have
same capacity.
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							 1. Automatic address setting (don’t need to set dip-switch)
If the wiring is connected properly as above example, the
address is set automatically by the main powersupply . An
indoor unit with remote control will be set as the master. If
the power source is installe d to indoor units and outdoo r
units separately, turn on the switch by following the
procedure: outdoor unit, then indoor unit with control, and
finally other indoor units.
When theslave units do not operate (when address cannot
be set)
 1. Automatic address setting (don’t need to set dip-switch)
If the wiring is connected properly as above example, the
AC numbe rs are set automatically by the main power
supply. An indoor unit withremote control will be set as the
master.
If the power source is installe d to indoor units and outdoo r
units separately, turn on the switch by following theReset the address by following the procedure:
 a. After making sure that dip-switches No. 1 to 4 and No.
8 are OFF, stop the operation.
 b. Push address reset button(SW3) on theoutdoor unit
PC board for 4 seconds. Self-diagnosis LED No. 2 to 8
will start blinking in order. And when all 7 pieces of LEDs
(No. 2 ~ 8) are illuminated, the address for the slave unit
has been reset.
Important:The address for the group control cannot be
reset, using the above mentioned procedure.
 2. Manua l address setting (by dip-switchDSW1)
Whensetting the address manua lly, set the dip-switch of
the PC board of the indoor unit as follows:
procedure: outdoor unit, then indoor unit with control, and
finally other indoor units. The AC numbe r will be set at
random.
When theslave units do not operate (when address cannot
be set)
57 
						

							Reset the address by following the procedure:
 a. Make sure that dip-switches No. 1 to 4 and No. 8 are
OFF, stop the operation.
 b. Simultaneously, push buttons “AIR SWING AUTO”,
“OPERATION ” and “A/C No.”. The address will be reset
and new address will be set.
Important:The address for the Twin/Triple control cannot
be reset, using the above mentioned
procedure.
 2. Manua l address setting (by dip-switchDSW1)
Whensetting the address manua lly, set the dip-switch of
the PC board of the indoor unit as follows:
 3. Manua l address setting (by dip-switchDSW1)
Whensetting the address manua lly, set the dip-switch of
the PC board in the indoor unit as follows:
Procedures of deleting memory for twin/triple control
system
 1. Switch off the main power supply.
 2. Set the No. 8 pin of dip switch (DSW1) at the indoor unit’s
P.C. board to “ON” position.
 3. Switch on the main power supply for a minute and then turn
it off.
 4. Set the No. 8 pin of dip switch (DSW1) to “OFF” position.
Procedures of deleting memory for group control system
 1. Switch off the main power supply.
 2. Set the No. 1 until No. 4 pin of dip switch (DSW1) at the
indoor unit’s P.C. board to “ON” position.
(Make sure No. 8 pin of dip switch (DSW1) is at “OFF”
position)
 3. Switch on the main power supply for a minute and then turn
it off.
 4. Set the No. 1 pin until No. 4 pin of dip switch (DSW1) to
“OFF” position.
(Important notice)
Above procedures are meant for deletin g memory on indoor
unit’s P.C. board. And it is not for Address reset.
Indoor unit P.C. board layout
Below drawing shows the location of dip switch 1(DSW1) on
the indoor unit P.C. board.
Dip switch 1 (DSW1). [to be used for manual setting]
58 
						

							Emergencyoperation
 
    • 
• •  • 
Emergency operation of outdoor unit
Emergency operation can be carried out by setting the
DSW1switch on the printed circuit board of the outdoor
unit to the EMERGENCY position. However, emergency
operation is only carried out when an abnormality is
detected by the indoor/outdoor temperature thermistors.
The resistance values of each thermistor are measured
as shown in the table below to determine if there is an
abnormality.
Thermistor resistance table
Temperatu reResistance value (kΩ
)±5%
Room temperature
thermistorPipe temperature
thermistor
-20°C205.8197.8
-10°C114.6111.9
-5°C87.385.4
0°C67.065.8
5°C51.851.0
10°C40.439.9
15°C31.730.7
20°C25.125.0
25°C20.020.0
30°C16.116.0
40°C10.410.6
50°C6.97.1
60°C4.74.9
70°C----3.5
80°C----2.5
90°C----1.8
100°C----1.4
The pipe temperature thermistor resistance value are
the same for the indoor and outdoor units.

 
    − 
− −  − 
Set only the thermistor which shows an abnormality
to the condition as shown in the table below to carry
out emergency operation.
ThermistorCooling modeHeating mode
Indoor unitRoom temperatureFixed at 25°C
Pipe temperatureShortedOpen
ThermistorCooling modeHeating mode
Outdoor unitDischarge temperatureOpenShorted
Heat exchanger outlet
temperatureShortedOpen
 
    − 
− −  − 
Refer to the circuit diagram for the connection
locations for each thermistor.
 
    − 
− −  − 
If there is an abnormality in the roomtemperature
thermistor, the temperature will be fixed at 25°C
regardless of the remote controldisplay .
NOTE:
 
    − 
− −  − 
Any abnormalities detected by the temperature
thermistors are ignored during emergency operation,
therefore, long-term operation in this mode should
be avoided.
 
    − 
− −  − 
After emergency mode operation has been
completed and normal operation is to be resumed,
turn off the power supplie s for the indoor and
outdoor units and set theDSW1switch to NORMAL
position.
 
    − 
− −  − 
Self-diagnosis LEDs 4 to 6 will flash during
emergency operation.
25 EMERGENCY OPERATION
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							26 CONTROL
Description of basic Functions
26.1. Cooling mode operation time chart
(*1)
Outdoor unit fan start control during cooling
At the start of cooling mode and drying mode operation, the outdoo r unit heat exchan ger outlet temperature is detected in order
to set the fan speed.
Operation is carried out at the fan speed detected for 30 seconds.
After 30 seconds, the heat exchan ger outlet temperature is detected and the outdoo r unit fan speed is changed automatically .
(*2)
Cooling low outdoor temperature protection
When theoutlet temperature of the heat exchan ger drops to less than 12°C for a continuous period of 10 minutes, the outdoor unit
stops.
This is cancelled after 3 minutes (re-start prevention)
 
    • 
• •  • 
Remote control display s and indoor unit operation continue during thistime.
 
    • 
• •  • 
The 10 minutes countdown is cleared if the compressor stops or if the temperature at the outdoor unit outlet rises to 13.5°C or
higher.
60